How do I use pots on my client machine to change values, from the field, on my server machine and all other client machines?

[JPhillips]

I am using Lookout 4.5, build 12, and I am having a problem concerning pots. I have data tables created for the different size sewer stations my system monitors. For each station, there are setpoints for starting and stopping of the pumps. I want to be able to change the setpoints for a station on the client file using a pot and have it change on all other machines running Lookout. I did this in 3.8 using DDE, but I don't want to use DDE anymore.

I created a pot on the client file and URL'ed it to a pot on the server. On the server I created a table with a generic member "A" named "Lead Setp" and then created a member "A1" named
"C5_1LeadSetp" then a member "A2" named "C3_1LeadSetp" and so on....

In this table I connected the generic member "A" to the Pot I created on the server, and I connected A1 to its corresponding setpoint signal coming in from the field.

On the client file I connected (in the table similar to the one on the server but with all signals for the station) the "A1" member to the setpoint signal coming in from the field, and I connected the "A" member to the Pot I created on the client file which is URL'ed to the pot on the server file.

But, when I change the value of the pot on the client file, only the pot on the server and the "A" member in the table on the server change to the value of the pot on the client. The "A1" member whose screen I am changing the values from on the client does not change! This is the last thing I have to do and my file will be completely converted to 4.0. Does anyone have any ideas?

Thanks for any responses..

GBWY

Jason

[Khalid]

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Hi Jason,

If I understood your task correctly, you want to change the Setpoints on the Server DataTable using Pots from different clients. And also reflect these changes on the clients locally.

You correctly remoted the Pots on the Clients to the corresponding Pots on the Server. However, you do not need tables on your clients. All you need is Expressions on each client to the particular cell of the Clients.

So, to summarize: On the Server, the Pots write to the DataTable. And since the Pots on the Clients are remoted to these Pots on the Server, you can affect any change using these Pots. Because of the common remote source (Server Pots, i.e.) all of these Pots will always be in sync. Finally, to get the Setpoints on the Clients, just insert Expressio
ns to the Server's DataTable.

I am attaching a simple example (exmpl.zip) which does this. There are three processes -- My_Server, My_Client1, and My_Client2. I had them setup on the same machine so the paths are all process relative, but you can always change those to computer relative or absolute and move the client processes to diff machines.

Hope this helps.

Rgds,

Khalid 🙂


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